"I just read yet another article talking about the devastating effects of fertilizer runoff on marine life... "
Yeah, there's a giant dead zone in the Gulf of Mexico where the runoff from farming in the midwest seeps into the Mississippi River.
http://www.gulfhypoxia.net/
We swam with the sharks in Hawaii, even though we were in a cage it was still pretty intense!
There is a place near Cabo where you can swim with sailfish. They found
it a couple years ago. Its an annual occurrence where they gather for the mating season, then disperse. And there is another place off baja where you can get in a cage where
great whites are swimming around you.
